Ensures that probing doesn't finish prematurely for small files.

Fixes using freed memory
Introduced in 74480198
Fixes: 471/fuzz-1-ffmpeg_VIDEO_AV_CODEC_ID_H264_fuzzer

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

This reflects a recent change to the spec draft.
Signed-off-by: James Almer <jamrial@gmail.com>

From e24d95c0e06a878d401ee34fd6742fcaddeeb95f Mon Sep 17 00:00:00 2001
From: Joel Cunningham <joel.cunningham@me.com>
Date: Mon, 9 Jan 2017 13:37:51 -0600
Subject: [PATCH] tcp: set socket buffer sizes before listen/connect/accept

Attempting to set SO_RCVBUF and SO_SNDBUF on TCP sockets after connection
establishment is incorrect and some stacks ignore the set call on the socket at
this point.  This has been observed on MacOS/iOS.  Windows 7 has some peculiar
behavior where setting SO_RCVBUF after applies only if the buffer is increasing
from the default while decreases are ignored.  This is possibly how the incorrect
usage has gone unnoticed

Unix Network Programming Vol. 1: The Sockets Networking API (3rd edition, seciton 7.5):

"When setting the size of the TCP socket receive buffer, the ordering of the
function calls is important.  This is because of TCP's window scale option,
which is exchanged with the peer on SYN segments when the connection is
established. For a client, this means the SO_RCVBUF socket option must be
set before calling connect.  For a server, this means the socket option must
be set for the listening socket before calling listen.  Setting this option
for the connected socket will have no effect whatsoever on the possible window
scale option because accept does not return with the connected socket until
TCP's three-way handshake is complete.  This is why the option must be set on
the listening socket. (The sizes of the socket buffers are always inherited from
the listening socket by the newly created connected socket)"
Signed-off-by: Joel Cunningham <joel.cunningham@me.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Return AVERROR_INVALIDDATA if all four bytes aren't present.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Sasi Inguva <isasi@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes #4767.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes out of array access
Fixes: 452/fuzz-1-ffmpeg_VIDEO_AV_CODEC_ID_INTERPLAY_VIDEO_fuzzer

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

When bytes_read overflowed, last_bytes_read did not yet overflow
and no bytes-read report was created leading to a timeout.

Analyzed-by: Thomas Bernhard

Fixes ticket #5836.

Current code returned the number of channels as channel layout in that case,
and if nret is not set then unknown layouts are typically not supported.

Also use the common parsing code. Use a temporary workaround to parse an
unknown channel layout such as '13c', after a 1 year grace period only '13C'
will work.
Signed-off-by: Marton Balint <cus@passwd.hu>

Return a channel layout and the number of channels based on the specified name.

This function is similar to av_get_channel_layout(), but can also parse unknown
channel layout specifications.

Unknown channel layout specifications are a decimal number and a capital 'C'
suffix, in order to not break compatibility with the lowercase 'c' suffix,
which is used for a guessed channel layout with the specified number of
channels.
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Tested-by: ami_stuff

Fixes a part of ticket #6094.

Fixes timeout
Fixes: 446/fuzz-3-ffmpeg_VIDEO_AV_CODEC_ID_VP6_fuzzer

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

This work is sponsored by, and copyright, Google.

This is similar to the arm version, but due to the larger registers
on aarch64, we can do 8 pixels at a time for all filter sizes.

Examples of runtimes vs the 32 bit version, on a Cortex A53:
                                             ARM AArch64
vp9_loop_filter_h_4_8_10bpp_neon:          213.2   172.6
vp9_loop_filter_h_8_8_10bpp_neon:          281.2   244.2
vp9_loop_filter_h_16_8_10bpp_neon:         657.0   444.5
vp9_loop_filter_h_16_16_10bpp_neon:       1280.4   877.7
vp9_loop_filter_mix2_h_44_16_10bpp_neon:   397.7   358.0
vp9_loop_filter_mix2_h_48_16_10bpp_neon:   465.7   429.0
vp9_loop_filter_mix2_h_84_16_10bpp_neon:   465.7   428.0
vp9_loop_filter_mix2_h_88_16_10bpp_neon:   533.7   499.0
vp9_loop_filter_mix2_v_44_16_10bpp_neon:   271.5   244.0
vp9_loop_filter_mix2_v_48_16_10bpp_neon:   330.0   305.0
vp9_loop_filter_mix2_v_84_16_10bpp_neon:   329.0   306.0
vp9_loop_filter_mix2_v_88_16_10bpp_neon:   386.0   365.0
vp9_loop_filter_v_4_8_10bpp_neon:          150.0   115.2
vp9_loop_filter_v_8_8_10bpp_neon:          209.0   175.5
vp9_loop_filter_v_16_8_10bpp_neon:         492.7   345.2
vp9_loop_filter_v_16_16_10bpp_neon:        951.0   682.7

This is significantly faster than the ARM version in almost
all cases except for the mix2 functions.

Based on START_TIMER/STOP_TIMER wrapping around a few individual
functions, the speedup vs C code is around 2-3x.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

Compared to the arm version, on aarch64 we can keep the full 8x8
transform in registers, and for 16x16 and 32x32, we can process
it in slices of 4 pixels instead of 2.

Examples of runtimes vs the 32 bit version, on a Cortex A53:
                                                ARM  AArch64
vp9_inv_adst_adst_4x4_sub4_add_10_neon:       111.0    109.7
vp9_inv_adst_adst_8x8_sub8_add_10_neon:       914.0    733.5
vp9_inv_adst_adst_16x16_sub16_add_10_neon:   5184.0   3745.7
vp9_inv_dct_dct_4x4_sub1_add_10_neon:          65.0     65.7
vp9_inv_dct_dct_4x4_sub4_add_10_neon:         100.0     96.7
vp9_inv_dct_dct_8x8_sub1_add_10_neon:         111.0    119.7
vp9_inv_dct_dct_8x8_sub8_add_10_neon:         618.0    494.7
vp9_inv_dct_dct_16x16_sub1_add_10_neon:       295.1    284.6
vp9_inv_dct_dct_16x16_sub2_add_10_neon:      2303.2   1883.9
vp9_inv_dct_dct_16x16_sub8_add_10_neon:      2984.8   2189.3
vp9_inv_dct_dct_16x16_sub16_add_10_neon:     3890.0   2799.4
vp9_inv_dct_dct_32x32_sub1_add_10_neon:      1044.4   1012.7
vp9_inv_dct_dct_32x32_sub2_add_10_neon:     13333.7   9695.1
vp9_inv_dct_dct_32x32_sub16_add_10_neon:    18531.3  12459.8
vp9_inv_dct_dct_32x32_sub32_add_10_neon:    24470.7  16160.2
vp9_inv_wht_wht_4x4_sub4_add_10_neon:          83.0     79.7

The larger transforms are significantly faster than the corresponding
ARM versions.

The speedup vs C code is smaller than in 32 bit mode, probably
because the 64 bit intermediates in the C code can be expressed
more efficiently in aarch64.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

This has mostly got the same differences to the 8 bit version as
in the arm version. For the horizontal filters, we do 16 pixels
in parallel as well. For the 8 pixel wide vertical filters, we can
accumulate 4 rows before storing, just as in the 8 bit version.

Examples of runtimes vs the 32 bit version, on a Cortex A53:
                                           ARM   AArch64
vp9_avg4_10bpp_neon:                      35.7      30.7
vp9_avg8_10bpp_neon:                      93.5      84.7
vp9_avg16_10bpp_neon:                    324.4     296.6
vp9_avg32_10bpp_neon:                   1236.5    1148.2
vp9_avg64_10bpp_neon:                   4639.6    4571.1
vp9_avg_8tap_smooth_4h_10bpp_neon:       130.0     128.0
vp9_avg_8tap_smooth_4hv_10bpp_neon:      440.0     440.5
vp9_avg_8tap_smooth_4v_10bpp_neon:       114.0     105.5
vp9_avg_8tap_smooth_8h_10bpp_neon:       327.0     314.0
vp9_avg_8tap_smooth_8hv_10bpp_neon:      918.7     865.4
vp9_avg_8tap_smooth_8v_10bpp_neon:       330.0     300.2
vp9_avg_8tap_smooth_16h_10bpp_neon:     1187.5    1155.5
vp9_avg_8tap_smooth_16hv_10bpp_neon:    2663.1    2591.0
vp9_avg_8tap_smooth_16v_10bpp_neon:     1107.4    1078.3
vp9_avg_8tap_smooth_64h_10bpp_neon:    17754.6   17454.7
vp9_avg_8tap_smooth_64hv_10bpp_neon:   33285.2   33001.5
vp9_avg_8tap_smooth_64v_10bpp_neon:    16066.9   16048.6
vp9_put4_10bpp_neon:                      25.5      21.7
vp9_put8_10bpp_neon:                      56.0      52.0
vp9_put16_10bpp_neon/armv8:              183.0     163.1
vp9_put32_10bpp_neon/armv8:              678.6     563.1
vp9_put64_10bpp_neon/armv8:             2679.9    2195.8
vp9_put_8tap_smooth_4h_10bpp_neon:       120.0     118.0
vp9_put_8tap_smooth_4hv_10bpp_neon:      435.2     435.0
vp9_put_8tap_smooth_4v_10bpp_neon:       107.0      98.2
vp9_put_8tap_smooth_8h_10bpp_neon:       303.0     290.0
vp9_put_8tap_smooth_8hv_10bpp_neon:      893.7     828.7
vp9_put_8tap_smooth_8v_10bpp_neon:       305.5     263.5
vp9_put_8tap_smooth_16h_10bpp_neon:     1089.1    1059.2
vp9_put_8tap_smooth_16hv_10bpp_neon:    2578.8    2452.4
vp9_put_8tap_smooth_16v_10bpp_neon:     1009.5     933.5
vp9_put_8tap_smooth_64h_10bpp_neon:    16223.4   15918.6
vp9_put_8tap_smooth_64hv_10bpp_neon:   32153.0   31016.2
vp9_put_8tap_smooth_64v_10bpp_neon:    14516.5   13748.1

These are generally about as fast as the corresponding ARM
routines on the same CPU (at least on the A53), in most cases
marginally faster.

The speedup vs C code is around 4-9x.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

This is more in line with how it will be extended for more bitdepths.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

This is pretty much similar to the 8 bpp version, but in some senses
simpler. All input pixels are 16 bits, and all intermediates also fit
in 16 bits, so there's no lengthening/narrowing in the filter at all.

For the full 16 pixel wide filter, we can only process 4 pixels at a time
(using an implementation very much similar to the one for 8 bpp),
but we can do 8 pixels at a time for the 4 and 8 pixel wide filters with
a different implementation of the core filter.

Examples of relative speedup compared to the C version, from checkasm:
                                   Cortex    A7     A8     A9    A53
vp9_loop_filter_h_4_8_10bpp_neon:          1.83   2.16   1.40   2.09
vp9_loop_filter_h_8_8_10bpp_neon:          1.39   1.67   1.24   1.70
vp9_loop_filter_h_16_8_10bpp_neon:         1.56   1.47   1.10   1.81
vp9_loop_filter_h_16_16_10bpp_neon:        1.94   1.69   1.33   2.24
vp9_loop_filter_mix2_h_44_16_10bpp_neon:   2.01   2.27   1.67   2.39
vp9_loop_filter_mix2_h_48_16_10bpp_neon:   1.84   2.06   1.45   2.19
vp9_loop_filter_mix2_h_84_16_10bpp_neon:   1.89   2.20   1.47   2.29
vp9_loop_filter_mix2_h_88_16_10bpp_neon:   1.69   2.12   1.47   2.08
vp9_loop_filter_mix2_v_44_16_10bpp_neon:   3.16   3.98   2.50   4.05
vp9_loop_filter_mix2_v_48_16_10bpp_neon:   2.84   3.64   2.25   3.77
vp9_loop_filter_mix2_v_84_16_10bpp_neon:   2.65   3.45   2.16   3.54
vp9_loop_filter_mix2_v_88_16_10bpp_neon:   2.55   3.30   2.16   3.55
vp9_loop_filter_v_4_8_10bpp_neon:          2.85   3.97   2.24   3.68
vp9_loop_filter_v_8_8_10bpp_neon:          2.27   3.19   1.96   3.08
vp9_loop_filter_v_16_8_10bpp_neon:         3.42   2.74   2.26   4.40
vp9_loop_filter_v_16_16_10bpp_neon:        2.86   2.44   1.93   3.88

The speedup vs C code measured in checkasm is around 1.1-4x.
These numbers are quite inconclusive though, since the checkasm test
runs multiple filterings on top of each other, so later rounds might
end up with different codepaths (different decisions on which filter
to apply, based on input pixel differences).

Based on START_TIMER/STOP_TIMER wrapping around a few individual
functions, the speedup vs C code is around 2-4x.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

This is structured similarly to the 8 bit version. In the 8 bit
version, the coefficients are 16 bits, and intermediates are 32 bits.

Here, the coefficients are 32 bit. For the 4x4 transforms for 10 bit
content, the intermediates also fit in 32 bits, but for all other
transforms (4x4 for 12 bit content, and 8x8 and larger for both 10
and 12 bit) the intermediates are 64 bit.

For the existing 8 bit case, the 8x8 transform fit all coefficients in
registers; for 10/12 bit, when the coefficients are 32 bit, the 8x8
transform also has to be done in slices of 4 pixels (just as 16x16 and
32x32 for 8 bit).

The slice width also shrinks from 4 elements to 2 elements in parallel
for the 16x16 and 32x32 cases.

The 16 bit coefficients from idct_coeffs and similar tables also need
to be lenghtened to 32 bit in order to be used in multiplication with
vectors with 32 bit elements. This leads to the fixed coefficient
vectors needing more space, leading to more cases where they have to
be reloaded within the transform (in iadst16).

This technically would need testing in checkasm for subpartitions
in increments of 2, but that slows down normal checkasm runs
excessively.

Examples of relative speedup compared to the C version, from checkasm:
                                     Cortex    A7     A8     A9    A53
vp9_inv_adst_adst_4x4_sub4_add_10_neon:      4.83  11.36   5.22   6.77
vp9_inv_adst_adst_8x8_sub8_add_10_neon:      4.12   7.60   4.06   4.84
vp9_inv_adst_adst_16x16_sub16_add_10_neon:   3.93   8.16   4.52   5.35
vp9_inv_dct_dct_4x4_sub1_add_10_neon:        1.36   2.57   1.41   1.61
vp9_inv_dct_dct_4x4_sub4_add_10_neon:        4.24   8.66   5.06   5.81
vp9_inv_dct_dct_8x8_sub1_add_10_neon:        2.63   4.18   1.68   2.87
vp9_inv_dct_dct_8x8_sub4_add_10_neon:        4.52   9.47   4.24   5.39
vp9_inv_dct_dct_8x8_sub8_add_10_neon:        3.45   7.34   3.45   4.30
vp9_inv_dct_dct_16x16_sub1_add_10_neon:      3.56   6.21   2.47   4.32
vp9_inv_dct_dct_16x16_sub2_add_10_neon:      5.68  12.73   5.28   7.07
vp9_inv_dct_dct_16x16_sub8_add_10_neon:      4.42   9.28   4.24   5.45
vp9_inv_dct_dct_16x16_sub16_add_10_neon:     3.41   7.29   3.35   4.19
vp9_inv_dct_dct_32x32_sub1_add_10_neon:      4.52   8.35   3.83   6.40
vp9_inv_dct_dct_32x32_sub2_add_10_neon:      5.86  13.19   6.14   7.04
vp9_inv_dct_dct_32x32_sub16_add_10_neon:     4.29   8.11   4.59   5.06
vp9_inv_dct_dct_32x32_sub32_add_10_neon:     3.31   5.70   3.56   3.84
vp9_inv_wht_wht_4x4_sub4_add_10_neon:        1.89   2.80   1.82   1.97

The speedup compared to the C functions is around 1.3 to 7x for the
full transforms, even higher for the smaller subpartitions.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

The plain pixel put/copy functions are used from the 8 bit version,
for the double size (e.g. put16 uses ff_vp9_copy32_neon), and a new
copy128 is added.

Compared with the 8 bit version, the filters can no longer use the
trick to accumulate in 16 bit with only saturation at the end, but now
the accumulators need to be 32 bit. This avoids the need to keep track
of which filter index is the largest though, reducing the size of the
executable code for these filters.

For the horizontal filters, we only do 4 or 8 pixels wide in parallel
(while doing two rows at a time), since we don't have enough register
space to filter 16 pixels wide.

For the vertical filters, we still do 4 and 8 pixels in parallel just
as in the 8 bit case, but we need to store the output after every 2
rows instead of after every 4 rows.

Examples of relative speedup compared to the C version, from checkasm:
                               Cortex    A7     A8     A9    A53
vp9_avg4_10bpp_neon:                   2.25   2.44   3.05   2.16
vp9_avg8_10bpp_neon:                   3.66   8.48   3.86   3.50
vp9_avg16_10bpp_neon:                  3.39   8.26   3.37   2.72
vp9_avg32_10bpp_neon:                  4.03  10.20   4.07   3.42
vp9_avg64_10bpp_neon:                  4.15  10.01   4.13   3.70
vp9_avg_8tap_smooth_4h_10bpp_neon:     3.38   6.22   3.41   4.75
vp9_avg_8tap_smooth_4hv_10bpp_neon:    3.89   6.39   4.30   5.32
vp9_avg_8tap_smooth_4v_10bpp_neon:     5.32   9.73   6.34   7.31
vp9_avg_8tap_smooth_8h_10bpp_neon:     4.45   9.40   4.68   6.87
vp9_avg_8tap_smooth_8hv_10bpp_neon:    4.64   8.91   5.44   6.47
vp9_avg_8tap_smooth_8v_10bpp_neon:     6.44  13.42   8.68   8.79
vp9_avg_8tap_smooth_64h_10bpp_neon:    4.66   9.02   4.84   7.71
vp9_avg_8tap_smooth_64hv_10bpp_neon:   4.61   9.14   4.92   7.10
vp9_avg_8tap_smooth_64v_10bpp_neon:    6.90  14.13   9.57  10.41
vp9_put4_10bpp_neon:                   1.33   1.46   2.09   1.33
vp9_put8_10bpp_neon:                   1.57   3.42   1.83   1.84
vp9_put16_10bpp_neon:                  1.55   4.78   2.17   1.89
vp9_put32_10bpp_neon:                  2.06   5.35   2.14   2.30
vp9_put64_10bpp_neon:                  3.00   2.41   1.95   1.66
vp9_put_8tap_smooth_4h_10bpp_neon:     3.19   5.81   3.31   4.63
vp9_put_8tap_smooth_4hv_10bpp_neon:    3.86   6.22   4.32   5.21
vp9_put_8tap_smooth_4v_10bpp_neon:     5.40   9.77   6.08   7.21
vp9_put_8tap_smooth_8h_10bpp_neon:     4.22   8.41   4.46   6.63
vp9_put_8tap_smooth_8hv_10bpp_neon:    4.56   8.51   5.39   6.25
vp9_put_8tap_smooth_8v_10bpp_neon:     6.60  12.43   8.17   8.89
vp9_put_8tap_smooth_64h_10bpp_neon:    4.41   8.59   4.54   7.49
vp9_put_8tap_smooth_64hv_10bpp_neon:   4.43   8.58   5.34   6.63
vp9_put_8tap_smooth_64v_10bpp_neon:    7.26  13.92   9.27  10.92

For the larger 8tap filters, the speedup vs C code is around 4-14x.
Signed-off-by: Martin Storsjö <martin@martin.st>

This work is sponsored by, and copyright, Google.

This is more in line with how it will be extended for more bitdepths.
Signed-off-by: Martin Storsjö <martin@martin.st>

* commit 'fd5e6a09':
  x86util: Extend SPLATW for avx2

This commit is a noop, see 1ace9573
(only libavutil/x86/x86util.asm chunk).
Merged-by: Clément Bœsch <u@pkh.me>

* commit '37961044':
  checkasm: arm: Ignore changes to bits 0-4 and 7 of FPSCR
  cheackasm/arm: remove NEON instructions from checkasm_checked_call_vfp
  checkasm: arm: Don't start new const blocks for each string

This merge is a noop: the changes were included in 9f1c81e5.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '5ece6911':
  apichanges: Fill in missing hashes and dates

This commit is a noop as we need to fill with our own hashes.
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'facdfe40':
  swscale: Add proper ff_ prefix to init functions

This commit is a noop, see e8c37160

I'm keeping our ff_sws_ vs ff_ since we use ff_sws_ in other places in
swscale.
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'c0fd2fb2':
  swscale: Rename sws_context_class to ff_sws_context_class

This commit is a noop, see 8bfbc8c5Merged-by: Clément Bœsch <u@pkh.me>

* commit '71a04721':
  checkasm: arm: report the first clobbered register in checkasm_checked_call

Also includes 446353ea, 59aeed93, and 37961044 to avoid breaking
too much stuff.
Merged-by: Clément Bœsch <u@pkh.me>

Fixes timeout
Fixes: 445/fuzz-3-ffmpeg_VIDEO_AV_CODEC_ID_MJPEG_fuzzer
Fixes: 456/fuzz-2-ffmpeg_VIDEO_AV_CODEC_ID_JPEGLS_fuzzer

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit 'a8fce24b':
  avconv_dxva2: support HEVC Main10 decoding

This commit is a noop, see 1ec14612Merged-by: Clément Bœsch <u@pkh.me>

* commit '33f6690e':
  hevc: offer DXVA2 for 10bit 420

This commit is a noop, see ccb94789Merged-by: Clément Bœsch <u@pkh.me>

* commit '38efff92':
  FATE: add a test for H.264 with two fields per packet
  h264: fix decoding multiple fields per packet with slice threads

This merge includes two commits because the FATE test was useful in
order to make proper testing.

The merge gets rid of the now unused:
- SLICE_SINGLETHREAD and SLICE_SKIPED macros
- max_contexts
- "again" label in decode_nal_units()

This commit also includes the fix from d3e4d406.

Thanks to wm4 and Michael Niedermayer for their testing.
Merged-by: Clément Bœsch <u@pkh.me>
Merged-by: Matthieu Bouron <matthieu.bouron@gmail.com>

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>